[scene: a very quiet room.]
Me: [thinks] Gosh, that’s a lot of drive noise. And it’s constant, not fluctuating. Whatever could be hammering the hard drive?
* checks Activity Monitor, nothing unusual
Me: [thinks] Is it the new external drive?
* unmounts it *
Me: [thinks] Nope, not that.
* quits out of a pile of running stuff
Me: [thinks] That hasn’t changed the noise at all.
* checks Activity Monitor again, still nothing unusual
* quits out of everything else
Me: [thinks] Still no change! What?
* logs out
Me: [thinks] STILL no change! Wow. Something really weird going on here.
* shuts down
* noise doesn’t change
Me: [thinks] ?????
Me: [looks around] Oh. It’s my cappuccino bubbles crackling.
Me: [thinks] Duh.